<template>
 <div>
  <div class="search">
   <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
  </div>
  <div class="search-content"  ref="search" v-show="keyword">
   <ul>
    <li v-for="item of list" :key="item.id" class="search-item border-bottom" @click="handleChangCity(item.name)">{{item.name}}</li>
    <li class="search-item  border-bottom" v-show="hasNoData">没有找到匹配数据</li>
   </ul>
  </div>
 </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  data () {
    return {
      keyword: '',
      list: [],
      timer: null
    }
  },
  methods: {
    handleChangCity (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  computed: {
    hasNoData () {
      return !this.list.length
    }
  },
  watch: {
    keyword () {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 100)
    }
  },
  updated () {
    this.scroll = new Bscroll(this.$refs.search)
  }
}
</script>
<style lang="stylus" scoped>
 @import '~styles/varibles.styl'
 .search
   height .72rem
   padding 0 .1rem
   background-color $bgColor
   .search-input
     box-sizing border-box
     width 100%
     height .62rem
     padding 0 .1rem
     line-height .62rem
     text-align center
     border-radius .06rem
     color #666
 .search-content
   overflow hidden
   z-index 1
   position absolute
   top 1.58rem
   left 0
   right 0
   bottom 0
   background-color #eee
   .search-item
     line-height .62rem
     padding-left .2rem
     color #666
     background-color #fff
</style>
